STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

RHEL 8 must require the maximum number of repeating characters of the same character class be limited to four when passwords are changed.

DISA Rule

SV-230360r627750_rule

Vulnerability Number

V-230360

Group Title

SRG-OS-000072-GPOS-00040

Rule Version

RHEL-08-020140

Severity

CAT II

CCI(s)

• CCI-000195 - The information system, for password-based authentication, when new passwords are created, enforces that at least an organization-defined number of characters are changed.

Weight

10

Fix Recommendation

Configure the operating system to require the change of the number of repeating characters of the same character class when passwords are changed by setting the "maxclassrepeat" option.

Add the following line to "/etc/security/pwquality.conf" conf (or modify the line to have the required value):

maxclassrepeat = 4

Check Contents

Check for the value of the "maxclassrepeat" option in "/etc/security/pwquality.conf" with the following command:

$ sudo grep maxclassrepeat /etc/security/pwquality.conf

maxclassrepeat = 4

If the value of "maxclassrepeat" is set to more than "4" or is commented out, this is a finding.

Vulnerability Number

V-230360

Documentable

False

Rule Version

RHEL-08-020140

Severity Override Guidance

Check for the value of the "maxclassrepeat" option in "/etc/security/pwquality.conf" with the following command:

$ sudo grep maxclassrepeat /etc/security/pwquality.conf

maxclassrepeat = 4

If the value of "maxclassrepeat" is set to more than "4" or is commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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